New Advance in the Late Darriwillian to Early Sandbian Graptolite Biostratigraphy of Western Zhejiang and Northeastern Jiangxi Provinces, SE China
详细信息
- 责任者：Song Yanyan (Nanjing Institute of Geology and Palaeontology ; Chinese Academy of Sciences ; Nanjing 210008 ; China) ; Zhang Yuandong
- 刊名：Journal of Stratigraphy
- 出版年：2013
- 卷期：37(2)
- 关键词：笔石纲 ; Graptolithina ; 浙江 ; Zhejiang Province ; 江西 ; Jiangxi Province
- 页码：p.144-154
- 图表：illus., 45 refs.
- 分类号：1102
- issnNo：ISSN0253-4959
- isbnNo：CN32-1187/P
摘要
Two recently-exposed sections, Hengdu Quarry in Jiangshan and Liujia road-cut section in Tonglu, western Zhejiang Province, offer excellent exposure of Tremadocian-Sandbian strata. On the basis of the graptolite successions, four graptolite zones are recognized, in an ascending order, the Nicholsonograptus fasciculatus, the Pterograptus elegans, the “Hustedograptus teretiusculus” (and Dicellograptus vagus Subzone), and the Nemagraptus gracilis biozones. Based on the palaeontological and biostratigraphic study of these specimens, the FADs of these Dicellograptus species are summarized, and the origin and early evolution of dicellograptids is discussed in this paper.